Amphipod Orcliestiiv lucuiauna, Fritz MCiller. 385 



but those of tlie fifth suiil to Lecome broader in oUl males 

 (Fiitz Miillcr). Uropod 1 witli peduncle scarcely longer 

 than lunii, ita uppor margin bearing numerous spines, both 

 rami with lateral as well as terminal spines. Uropod 2 with 

 rami about as long asp-duiicle, both witii lateral and terminal 

 spines. Uroj)od 3 with ramus about as l<»ng as jjeduncle, 

 with spines on margin and at apex. Telson with postericjr 

 nnirgin rounded and fringed with numerous spines, very 

 slightly inilenteil in middh-. 



Female. — First gnatliopod with side-plate small, triangu- 

 larly produced in front, carpus longer and slightly broader 

 than the propod, which narrows dislally, so that the joint is 

 simple, without ))alm. Second gnathopod with basis o£ 

 neaily same width throughout, broadened, but not greatly so ; 

 carpus and propod subequal, long-oval, posterior margin of 

 carpus moderately and regularly convex. Perjeopods as in 

 male, but with the joints a little more slender. In other 

 respects closely resembling the male. 



Length of largest male examined about 14 mm. 



Lucalitij. Banks of Waitohi stream, Picton, at some 

 distance from mouth ; Ra|)iti Island (Filkol) {?). 



Diitrihution. New Zealand, South Brazil, Madeira (?). 



Remarks. 



Tiie mouth-parts are of the type usual in Orchestia, and do 

 not call for detailed description. The palp on the first 

 maxilla is minute, but distinct. In the largest male examined 

 thee appears to be an obscure rudiment of the fourth joint of 

 the palp of the maxilliped, but I can find no sign of it in two 

 other specimens mounted, viz., a male less developed and a 

 female. 



The New Zealand specimens appear to differ from 

 Stebbing's description of the single specimen of 0. suleiisoui 

 in having the first antenna slightly longer, the flagellum 

 having more than four joints. In the first gnathopod the 

 rounded lobe at the distal end is more distinct and in the 

 second the palm is more transverse ; both these differences 

 are probably due to the fact that the type-specimen of 0. su~ 

 letisuni was hardly so mature as the Picton sj)ecimens. In 

 the third uropod the ramus is as long as the j)eduiicle ; 

 Stebhing describes it as " not half as long or half as hroad.'' 



Fritz Aliiller's account dials only with a few special points. 

 His figure of the second gnathopod cf the male do»snot show 

 the tooth defining the palm, but the strongly maiked convex 



